1 K type pressure gauge fit clearance is too large, or because the valve core and valve hole sealing and grinding pits, the pressure of internal pressure gauge switch point each string of cavity, both made a lot of pressure oil leakage of the unloading port, such quantities down the pressure gauge with the actual pressure value of the measured points difference is very big, and even a few down all is a pressure point measurement, multi-point measurement. The valve core can be rearranged or the pressure gauge switch can be replaced at this time.
Flange switches to multi-point pressure gauge. When the pressure of the first pressure point is not removed, the pressure measured is not accurate when the valve core is moved into the second pressure point. The pressure gauge switch shall be used correctly as described above.
When the steel ball locating spring is stuck on the valve core and the steel ball is not pushed out, when rotating the valve core, the turning position is on the oil hole of the pressure point which is not allowed to be measured, so that the oil of the pressure point cannot enter the pressure gauge through the straight groove on the valve core, the pressure measurement is not allowed.
When the switch of the type KF pressure gauge is used for a long time, the valve port of the cone valve cannot be closed strictly due to wear, and the internal leakage is large. The X - type pressure gauge switch cannot be tested because of excessive internal leakage.
